Update modeling_gpt_neox.py (#17575)
I'm guessing that the intention was to have the `_no_split_modules` class attribute for `GPTNeoXPreTrainedModel` to be set to `["GPTNeoXLayer"]`, akin to how its set as `["GPTJBlock"]` for `GPTJPreTrainedModel`.
If this is incorrect, please feel free to just close the PR.
Thanks!
